Skip to main content

Why does your dog stick out their tongue? Vets explain the ‘blep’

This behavior may be cute, but what does it really mean?

A pug with their tongue out wearing a camo helmet
Ezzolo / Shutterstock

There’s nothing funnier than a “blep,” but what does it mean? Whether you first heard the word blep on the internet (it is meme-worthy, after all), or are learning of it right now, you’re in for a treat. Bleps are positively adorable. The term started gaining traction in the late 2010s, though it’s no less popular today. The common canine behavior it’s based on, however, is a habit as old as time: sticking out a tongue. Yep, a dog’s tongue sticking out is enough to break the internet!

It’s pretty dang cute, after all, but not always easy to figure out why a dog’s tongue is out. Don’t worry, though, pet parents — this is a great place to start. Here is everything you need to know about bleps and what they mean.

Recommended Videos

What is a blep? How about a mlem?

A dachshund sticks out his tongue while being held up
Dominika Roseclay / Pexels

Besides being one of the most popular terms used in pet-related social media, a blep refers to when an animal sticks their tongue out of its mouth only slightly. Braxton’s Animal Works describes the action as “leaving the tongue, usually the tip, outside the mouth unconsciously.” Many pet owners will notice it while their buddy is sleeping, or even after they wake up.

Of course, not every incident of tongue-sicking-out is considered a blep. Another popular online term — “mlem” — refers to the act of sticking out the tongue as if the dog is licking … or at least in a licking-type motion. Lastly, a dog’s tongue could just hang out of its mouth completely, though the internet hasn’t coined a phrase for that yet (but you’ll see quite a few of these shots labeled “derp”)!

Should I be concerned if I see my dog’s tongue sticking out?

Funny portrait of a Welsh corgi pembroke dog showering with shampoo
Masarik / Shutterstock

As startling as it can be to find your furry friend chilling with their tongue outside of their mouth, you shouldn’t need to worry. Most reasons for a dog blepping are totally harmless. Still, Dr. Holly Ahlgrim of DoveLewis Veterinary Emergency and Specialty Hospital told The Dodo that a veterinary examination may be a good idea if this is a new behavior for your pup. Needless to say, you should also seek support if your buddy seems at all uncomfortable. Besides, it can bring you peace of mind to know what’s going on with your furry friend.

Once you have a “diagnosis” — remember, there may be no problem at all to identify — you can make sure your dog stays as comfortable as possible. Hydration is key for blepping pups. Having the tongue resting outside of the mouth can lead to immense dryness at times, so investing in a water fountain for your pet might be a smart idea.

As Dr. Linda Simon, MVB, MRCVS, explained to Wag!, there are times when a dog’s tongue protrusion can’t be prevented or fixed. Luckily, these tend to be the instances when it also causes no discomfort — like with hanging tongue syndrome. That’s just one reason why dogs blep, though, so keep on reading.

Does a tongue out mean a happy dog?

A woman wearing a sleep mask over her eyes snuggles a Pug with his tongue out in bed
fongleon356 / Shutterstock

It just might! While stress panting is a thing, if you spot your dog doing a blep, mlem, or acting overall derpy, it could indicate their inner joy. More specifically, their tongue sticking out just a bit tells you that they’re feeling chill. This might happen during sleep or a cuddle session.

You’ll also oftentimes spot your pup holding their tongue out after just getting a treat, perhaps savoring the taste of their favorite snack. While happiness might be the most common reason for a dog to put out their tongue, it’s not the only one.

What does tongue out panting mean?

An Australian shepherd dog lies in the grass, panting
Lindsay_Helms / Adobe Stock

Panting marks another time you might find your beastie with his tongue out and sometimes looks a bit like a blep or mlem. As we said above, some dogs pant when stressed — you might see a lot of tongue at the vet’s office, for instance. But most of the time, panting is a reaction to exercise or heat.

Because a dog can’t sweat like a person, they have to open their mouths and evaporate excess moisture, thus cooling their bodies down. Other things that cause panting include pain, fever, anemia, and a few medical conditions. Any time you spot your animal panting unexpectedly or for a long time, you should check in with your vet.

Why is my dog not closing their mouth?

A gray Chinese vrested dog looks up while their tongue hangs out to the side
Veronika_Andrews / Pixabay

Sometimes, your dog goes far beyond the derp and truly cannot close their mouth. This calls for an emergency intervention. While it could be something relatively harmless like a bad tooth, it also might be trigeminal neuritis. The condition causes a dog’s mouth to stay open at all times (it’s a form of paralysis) and can have devastating consequences.

Your vet will diagnose the exact issue and give you treatment options. In the case of trigeminal neuritis, the good news is that it goes away on its own. The bad news? You’ll need to nurse your little buddy around the clock while they can’t close their mouth to make sure they get adequate food and water. None of these look quite like a blep, and you should be able to tell the difference.

Why do dogs stick out their tongues? Here’s what experts have to say

A German shepherd puppy sticks out their tongue
Njegos K / Unsplash

Maybe you only see the tip of your dog’s tongue after they nap, or maybe it’s hanging completely out 24/7. As you can probably guess, these different situations have different causes.

Relaxation can cause the tongue to extend out of the mouth

This is probably what’s going on if you notice your dog’s tongue during or after their naps, but it could happen anytime. Older dogs might be more likely to blep from relaxation if they’ve started experiencing any age-related muscle decline. Neuropathy and other neurological issues can also contribute. As Dr. Ahlgrim suggested, it’s a good idea to visit the vet if this is a new or sudden behavior.

Hanging tongue syndrome is self-explanatory, but it’s nothing to worry about

Some dogs may also suffer from hanging tongue syndrome, which is exactly what it sounds like. Pilchuck Veterinary Hospital’s Dr. Kevin Wilson explained to The Seattle Times that this can have either genetic or non-genetic causes, most of which aren’t cause for concern.

A lot of the dogs that deal with “hanging tongues” are brachycephalic, or “smoosh-faced.” These are breeds like pugs, Shih Tzus, and bulldogs, though the list is much longer than those three. As Dr. Wilson said, “These dogs have functional tongues, but, because of genetics, the tongue may be too large for the oral cavity, an abnormal jaw bone doesn’t support the tongue or missing teeth allows the tongue to slip out through the gap.” If it’s genetic, you’ll likely notice it when your dog is still young.

Dental issues can also be a cause of tongue protrusion

Of all the non-genetic causes of hanging tongue syndrome, or even regular blepping, dental problems are the most common. Dr. Wilson explained that, when a dog is missing teeth or even just support in the lower jaw, the tongue can roll or hang out of the mouth. Of course, it’s a good idea to have these dental concerns addressed.

By keeping an eye on your dog’s blepping habits and their general health, you can ensure they stay comfy while remaining as cute as can be. Then you can snap as many photos as possible.

Gabrielle LaFrank
Gabrielle LaFrank has written for sites such as Psych2Go, Elite Daily, and, currently, PawTracks. When she's not writing, you…
5 telltale signs of dog joint pain you should never ignore
Here's what to watch out for
Someone stretches a Weimaraner dog's front leg

If pet parents had it our way, our furry friends would never feel pain or illness. Unfortunately, though, we don’t have the power to protect our pets from everything in the world, so issues like chronic pain still exist. Before you get too worried — most medical concerns that our dogs face can be remedied with all kinds of medications and treatments, so no pup has to suffer.

Dog joint pain is one of those examples. There are a number of ways to treat it — possibly even for good — but you’ll have to find out what caused it first. You can start by looking for certain signs of dog joint pain as your buddy goes about their everyday life, then talking to your vet about the best plan of treatment. Of course, you can give home remedies a try, but it’s always recommended to consult your trusted veterinarian.
What does joint pain in dogs look like?

Read more
Dog stung by a bee? Here’s what to do, according to vets
Treating dog bee stings at home and with your veterinarian
A dachshund dog standing beneath yellow flowers

There are so many reasons to love springtime, whether you're a human or a dog. From the beautiful blooms and adorable baby animals — the longer days and warmer weather are only the beginning! Spring is the perfect time to plan an outdoor activity with your furry friend, though it's always important to be mindful of springtime hazards for dogs, like bee stings.

Seeing your dog stung by a bee is never fun, but you'll be glad to know that it's rarely a big deal. Most dogs experience no symptoms besides minor pain and swelling, but it's always good to know what to keep an eye out for. Your eagle-eyed view could be the difference between a minor injury and a major, life-threatening reaction.
How can you tell if your dog was stung by a bee?

Read more
Can dogs eat cucumbers? The facts revealed
Your pup may love this watery treat
Beagle dog asks for cucumber in the kitchen

Some snacks are only for humans, but others, your pets can enjoy, too. Vegetables, in particular, often make a great treat for dogs because they're generally low in sugar and calories. Some veggies have so much water that they won't pack the pounds on your pup at all. Still, you don't ever want to replace their meals with too many treats of any kind, even green ones. So, can dogs eat cucumbers? We'll walk you through whether to offer this snack to your beastie and how to prepare it.
Are cucumbers safe for dogs?

As long as you don't overdo it, yup, you can give your pupper cukes. As we said at the top, this vegetable fruit consists of about 96% water, so your four-legged friend is mostly just drinking while they munch on it. However, don't take that as a sign that they can devour a whole bowl of them. Too many will hurt their tummy and can cause digestive issues, like vomiting and diarrhea. One last thing: Check with your vet before providing Fido with this treat. Among other things, cucumbers can interact with a few medications.
Are cucumbers good for dogs?

Read more